Change ViEEncoder to not reconfigure the encoder until the video resolution is known.

webrtc/video/vie_encoder.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 96 matching lines @@
     VideoFrameInfo(int width,
                    int height,
                    VideoRotation rotation,
                    bool is_texture)
         : width(width),
           height(height),
           rotation(rotation),
           is_texture(is_texture) {}
     int width;
     int height;
-    webrtc::VideoRotation rotation;
+    VideoRotation rotation;
     bool is_texture;
   };
 
   void ConfigureEncoderOnTaskQueue(VideoEncoderConfig config,
                                    size_t max_data_payload_length);
   void ReconfigureEncoder();
 
   // Implements VideoSinkInterface.
   void OnFrame(const VideoFrame& video_frame) override;
 
@@ skipping 75 matching lines @@
   // All public methods are proxied to |encoder_queue_|. It must must be
   // destroyed first to make sure no tasks are run that use other members.
   rtc::TaskQueue encoder_queue_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(ViEEncoder);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_VIE_ENCODER_H_